1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/e2gallerypro/e2upload/Backend/Assets/getid3/module.audio.mpc_old.php	Mon Feb 22 08:02:39 2010 -0500
     1.3 @@ -0,0 +1,107 @@
     1.4 +<?php
     1.5 +// +----------------------------------------------------------------------+
     1.6 +// | PHP version 5                                                        |
     1.7 +// +----------------------------------------------------------------------+
     1.8 +// | Copyright (c) 2002-2006 James Heinrich, Allan Hansen                 |
     1.9 +// +----------------------------------------------------------------------+
    1.10 +// | This source file is subject to version 2 of the GPL license,         |
    1.11 +// | that is bundled with this package in the file license.txt and is     |
    1.12 +// | available through the world-wide-web at the following url:           |
    1.13 +// | http://www.gnu.org/copyleft/gpl.html                                 |
    1.14 +// +----------------------------------------------------------------------+
    1.15 +// | getID3() - http://getid3.sourceforge.net or http://www.getid3.org    |
    1.16 +// +----------------------------------------------------------------------+
    1.17 +// | Authors: James Heinrich <infoØgetid3*org>                            |
    1.18 +// |          Allan Hansen <ahØartemis*dk>                                |
    1.19 +// +----------------------------------------------------------------------+
    1.20 +// | module.audio.mpc_old.php                                             |
    1.21 +// | Module for analyzing Musepack/MPEG+ Audio files - SV4-SV6            |
    1.22 +// | dependencies: NONE                                                   |
    1.23 +// +----------------------------------------------------------------------+
    1.24 +//
    1.25 +// $Id: module.audio.mpc_old.php,v 1.2 2006/11/02 10:48:01 ah Exp $
    1.26 +
    1.27 +        
    1.28 +        
    1.29 +class getid3_mpc_old extends getid3_handler
    1.30 +{
    1.31 +
    1.32 +    public function Analyze() {
    1.33 +
    1.34 +        $getid3 = $this->getid3;
    1.35 +        
    1.36 +        // http://www.uni-jena.de/~pfk/mpp/sv8/header.html
    1.37 +        
    1.38 +        $getid3->info['mpc']['header'] = array ();
    1.39 +        $info_mpc_header = &$getid3->info['mpc']['header'];
    1.40 +
    1.41 +        $getid3->info['fileformat']               = 'mpc';
    1.42 +        $getid3->info['audio']['dataformat']      = 'mpc';
    1.43 +        $getid3->info['audio']['bitrate_mode']    = 'vbr';
    1.44 +        $getid3->info['audio']['channels']        = 2;  // the format appears to be hardcoded for stereo only
    1.45 +        $getid3->info['audio']['lossless']        = false;
    1.46 +
    1.47 +        fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET);
    1.48 +
    1.49 +        $info_mpc_header['size'] = 8;
    1.50 +        $getid3->info['avdataoffset'] += $info_mpc_header['size'];
    1.51 +        
    1.52 +        $mpc_header_data = fread($getid3->fp, $info_mpc_header['size']);
    1.53 +            
    1.54 +        
    1.55 +        // Most of this code adapted from Jurgen Faul's MPEGplus source code - thanks Jurgen! :)
    1.56 +        $header_dword[0] = getid3_lib::LittleEndian2Int(substr($mpc_header_data, 0, 4));
    1.57 +        $header_dword[1] = getid3_lib::LittleEndian2Int(substr($mpc_header_data, 4, 4));
    1.58 +
    1.59 +
    1.60 +        // DDDD DDDD  CCCC CCCC  BBBB BBBB  AAAA AAAA
    1.61 +        // aaaa aaaa  abcd dddd  dddd deee  eeff ffff
    1.62 +        //
    1.63 +        // a = bitrate       = anything
    1.64 +        // b = IS            = anything
    1.65 +        // c = MS            = anything
    1.66 +        // d = streamversion = 0000000004 or 0000000005 or 0000000006
    1.67 +        // e = maxband       = anything
    1.68 +        // f = blocksize     = 000001 for SV5+, anything(?) for SV4
    1.69 +
    1.70 +        $info_mpc_header['target_bitrate']       =       (($header_dword[0] & 0xFF800000) >> 23);
    1.71 +        $info_mpc_header['intensity_stereo']     = (bool)(($header_dword[0] & 0x00400000) >> 22);
    1.72 +        $info_mpc_header['mid-side_stereo']      = (bool)(($header_dword[0] & 0x00200000) >> 21);
    1.73 +        $info_mpc_header['stream_major_version'] =        ($header_dword[0] & 0x001FF800) >> 11;
    1.74 +        $info_mpc_header['stream_minor_version'] = 0; 
    1.75 +        $info_mpc_header['max_band']             =        ($header_dword[0] & 0x000007C0) >>  6;  // related to lowpass frequency, not sure how it translates exactly
    1.76 +        $info_mpc_header['block_size']           =        ($header_dword[0] & 0x0000003F);
    1.77 +
    1.78 +        switch ($info_mpc_header['stream_major_version']) {
    1.79 +            case 4:
    1.80 +                $info_mpc_header['frame_count'] = ($header_dword[1] >> 16);
    1.81 +                break;
    1.82 +            case 5:
    1.83 +            case 6:
    1.84 +                $info_mpc_header['frame_count'] =  $header_dword[1];
    1.85 +                break;
    1.86 +
    1.87 +            default:
    1.88 +                throw new getid3_exception('Expecting 4, 5 or 6 in version field, found '.$info_mpc_header['stream_major_version'].' instead');
    1.89 +        }
    1.90 +
    1.91 +        if (($info_mpc_header['stream_major_version'] > 4) && ($info_mpc_header['block_size'] != 1)) {
    1.92 +            $getid3->warning('Block size expected to be 1, actual value found: '.$info_mpc_header['block_size']);
    1.93 +        }
    1.94 +
    1.95 +        $info_mpc_header['sample_rate'] = $getid3->info['audio']['sample_rate'] = 44100; // AB: used by all files up to SV7
    1.96 +        $info_mpc_header['samples']     = $info_mpc_header['frame_count'] * 1152 * $getid3->info['audio']['channels'];
    1.97 +
    1.98 +        $getid3->info['audio']['bitrate_mode'] = $info_mpc_header['target_bitrate'] == 0 ? 'vbr' : 'cbr';
    1.99 +
   1.100 +        $getid3->info['mpc']['bitrate']   = ($getid3->info['avdataend'] - $getid3->info['avdataoffset']) * 8 * 44100 / $info_mpc_header['frame_count'] / 1152;
   1.101 +        $getid3->info['audio']['bitrate'] = $getid3->info['mpc']['bitrate'];
   1.102 +        $getid3->info['audio']['encoder'] = 'SV'.$info_mpc_header['stream_major_version'];
   1.103 +        
   1.104 +        return true;
   1.105 +    }
   1.106 +    
   1.107 +}
   1.108 +
   1.109 +
   1.110 +?>
   1.111 \ No newline at end of file